Q. For a chemical reaction, the ratio of rate constant at 500 K to that at 400 K is 2.5. Given R = 8.314 J mol-1 K-1, the value of activation energy (in kJ/mol) is (A) 10.5 (B) 12.0 (C) 15.2 (D) 18.4 Ans: 15.2
Q. For absorption of H2S from a mixture with hydrocarbon vapour into an aqueous alkanolamine solution, the liquid phase mass transfer resistance is A. significantly higher than that of the gas phase B. negligible compared to that of the gas phase C. equal to that of the gas phase D. dependent on the gas phase
Q. According to the surface renewal theory, the unit of fractional rate of surface renewal is (A) m2 s-2 (B) m2 s-1 (C) m s-1 (D) s-1 Ans: s-1
Q. The reactant (M) is converted into product (N) in the presence of catalyst in a fixed bed reactor. All the flow rates (F, G, H, P and R) in mol/s, and mole fraction of reactant (M) in these streams (xF, xG, xH, xP and xR) are shown in the diagram. The overall fractional conversion
Q. Liquid phase isomerization of o-xylene to p-xylene using a zeolite catalyst was carried out in a CSTR. Three sets of kinetic data at different temperatures and stirring speeds were obtained as shown below. The operating condition at which the reaction rate is not controlled by external mass transfer resistance is (A) T = 500
Q. Two packed towers are designed for the same mass velocity of the gas. The first has liquid and gas flow rates of 30 kg/s and 1.2 kg/s, respectively, while the corresponding flow rates in the second tower are 67.5 kg/s and 1.8 kg/s. The ratio of the design diameter of the wider tower to
Q. The molecular formula of the predominant chemical compound in commercial sugar is (A) C12H22O11 (B) C12H24O12 (C) C6H10O5 (D) C6H12O6 Ans: C12H22O11
The molecular formula of the predominant chemical compound in commercial sugar is Read More »
Q. Polyvinyl chloride is produced by A. co-polymerization B. addition-type kinetics C. reacting chlorine with polyethylene D. reacting hydrochloric acid with polyethylene Ans: addition-type kinetics
Q. In connection with petroleum refining, identify the incorrect statement among the following options. A. Desalting of crude oil is done before processing it in atmospheric distillation unit B. A stream of hydrogen is produced in catalytic reforming of naphtha C. Asphalt used for paving is a petroleum product D. Cetane number indicates the quality
Q. Segmental baffles in a 2-4 shell and tube heat exchanger A. change the flow pattern of the tube side fluid and increase the overall heat transfer co- efficient B. increase the heat transfer coefficient in the shell side and support the tubes C. help to reduce the thermal expansion of the tubes and increase
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